/Engine/Source/Runtime/AdvancedWidgets/Public/Framework/PropertyViewer/IFieldExpander.h
the class that should be expended for this instance. The instance can be null.
[TOptional](API\Runtime\Core\IO\TOptional)< const [UClass](API\Runtime\CoreUObject\UObject\UClass) * > CanExpandObject ( const [FObjectPropertyBase](API\Runtime\CoreUObject\UObject\FObjectPropertyBase) * Property, const [UObject](API\Runtime\CoreUObject\UObject\UObject) * Instance ) const